Bob Dole, 89, hospitalized at Walter Reed

Updated 5:23 p.m. Eastern Time

Bob Dole, the 1996 Republican presidential nominee and longtime leader of Senate Republicans, has been hospitalized at Walter Reed Hospital, Senate Majority Leader Harry Reid announced Tuesday.

"He is at Walter Reed not for a checkup," Reid said on the Senate floor. "He is there because he is infirm. He is sick."

Shortly after Reid's comments, however, an assistant to Dole told CBS News in an email that Dole will leave the hospital tomorrow after a "routine" procedure.

"He checked himself in for a routine procedure and will discharge tomorrow," Dole's assistant said. "Doing well and watching the CRPD debate on CSPAN 2."

Reid spoke after Sen. John McCain, R-Ariz, read a letter from Dole urging passage of the Convention of Persons with Disabilities, or CPRD, which is focused on rights for the disabled. Dole, who is 89, sustained an injury in World War II that left his right arm shattered.